BLDC Motor Has Standard High Torque Density Design

BEI Kimco Magnetics, a company of Custom Sensors &
Technologies (CST), Inc., met the challenging motor requirements for a
revolutionary new cast removal system for a leading medical device
manufacturer. The cast cutting system was part of the manufacturer’s continuing
goal to develop products that reduce trauma for pediatric patients. In this
instance, the product would provide a new alternative to the conventional,
40-year old cast saw technology, which was loud, cumbersome, and threatening to
small children.

Key to the product’s design specification was a motor that
would deliver consistently high torques to drive the cutting heads of the tool
through several layers of cast material. It was also critical for the motor to
be compact, lightweight, and capable of extended battery operation.

To meet these requirements, BEI Kimco provided the High
Performance Size 23 BLDC Motor with customized housing and shaft. The Standard
High Torque Density Design (P/N DIH23-30-BFNA) delivers continuous power at levels
approaching 1 HP continuous at speeds up to 20 K RPM. Its compact size of just
2.3 in. O.D x 3.0 in. L with operating efficiencies in excess of 85% resulted
in a highly satisfactory motor solution, a motor powerful enough to drive the
device blades, yet small enough to support the ergonomics of the final product
for a cool running, comfortable patient solution. The motor’s competitive price
point easily allowed volume production of the new cast removal device.